edited by angrysparrow - I split this discussion from the Cuben Fiber thread. This discussion is good, but shouldn't hijack the topic.
The prevailing wisdom is that a hammock should be breathable.
Your statemant that we all use closed cell pads is far from accurate...In fact, between Speer pea pods, snug fits, home made UQs and 1/2 UQs, Garlington type taco tubes, Dams, Dam clones, JRB WS and JRB Under Quilts (numbering in the thousands) the majority of folks probably do not use pads. Certainly those who consider themselves back sweaters have moved on from pads.
YMMV... Glad it works for you...